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Hybrid Structured Illumination Expansion Microscopy Reveals Microbial Cytoskeleton Organization
Aaron R Halpern1, Germain C M Alas1, Tyler J Chozinski1
1Department of Chemistry, ‡Department of Biology, and §Department of Physiology and Biophysics, University of Washington , Seattle, Washington 98195, United States.
ACS Nano
|November 23, 2017
Summary
Researchers developed ExSIM, a super-resolution microscopy technique combining specimen expansion and structured illumination microscopy (SIM), achieving ~30 nm resolution. This method reveals new details of the Giardia lamblia cytoskeleton, advancing cell biology research.
Area of Science:
- Cell Biology
- Microscopy
- Biophysics
Background:
- Specimen expansion microscopy enables super-resolution imaging with standard equipment.
- Structured illumination microscopy (SIM) offers optical super-resolution capabilities.
Purpose of the Study:
- To combine specimen expansion with SIM to achieve higher spatial resolution.
- To investigate the ultrastructure of Giardia lamblia cytoskeleton using this novel method.
Main Methods:
- Developed ExSIM, a hybrid super-resolution technique integrating tissue-hydrogel expansion and SIM.
- Applied ExSIM to visualize the cytoskeleton, adhesive disc, and flagellar axonemes of Giardia lamblia.
Main Results:
- Achieved ~30 nm lateral resolution, significantly enhancing standard super-resolution capabilities.
- Determined the precise localization of two novel proteins (DAP86676 and DAP16263) within the Giardia cytoskeleton.
- Revealed previously unknown details of the Giardia lamblia adhesive disc and flagellar axonemes.
Conclusions:
- ExSIM is a simple, rapid, and powerful super-resolution method for fixed specimens.
- The technique offers broad applicability for studying biological ultrastructure in various systems.
- ExSIM provides valuable insights into the cell biology of pathogens like Giardia lamblia.
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